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KSTAR PFCs N₂ gas Baking System 설계 및 운전 결과
김상태(Sang-Tae Kim),정남용(Nam-Yong Jung),김영진(Young-Jin Kim),김이중(Lee-Jung Kim),김성기(Seong-Gi Kim),서중규(Jung-Gyu Seo),김양수(Yang-Su Kim) 대한설비공학회 2010 대한설비공학회 학술발표대회논문집 Vol.2010 No.11
PFCs N₂ gas baking system is close loop system and consists of a compressor(N₂ gas), a electric heater, a pre-cooler(gas vs gas), a cooler(gas vs water), a vacuum pump, etc. The system has following characteristics. 1) Because the compressor in a close loop system can not be operated at 400℃, the cooler was installed at its suction piping in order to keep its suction gas temperature below 150℃. 2) Pre-cooler, Pre-heater, constructed at cooler's suction piping in order to transfer a heat of return gas to a supply gas. 3) This system was performed a N₂ gas flow simulation for distribution optimized into PFCs and piping stress analysis in design step, and the results were applied a construction of the system. A by-pass operation in PFCs was conducted to 400℃, and PFCs baking operation was carried out to 200℃ for stability of other devices. This paper describes design of PFCs gas baking system, operating, problem & solution, results of commissioning.
고온 환경에서의 KSTAR PFC N₂ gas baking system의 자재성능실험
김영진(Young-Jin Kim),김상태(Sang-Tae Kim),정남용(Nam-Yong Jung),김이중(Lee-Jung Kim),김성기(Seong-Gi Kim),서중규(Jung-Gyu Seo),김양수(Yang-Su Kim) 대한설비공학회 2010 대한설비공학회 학술발표대회논문집 Vol.2010 No.6
KSTAR(Korea Superconducting TOKAMAK Advanced Research) PFC(Plasma Facing Component) N₂ gas baking system is a facility that circulates and heats nitrogen gas till 350℃ in order to heat the PFC installed in vacuum vessel of KSTAR. In this paper we discussed the test results about the strength stability of piping support and the insulating performance of insulator via the measurement of their surface temperatures, and the sealing performance of test valves through the leak test of the stem's packing, the bonnet's gasket and the disc's seat at 300℃, 160℃, 10℃ respectively.